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Old 06-03-2010, 03:53 PM   #2
Solo Lobo
airhead or nothing
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Joined: Mar 2004
Location: Shoreline, WA
Oddometer: 8,994
First, replace the battery.... if it is even the slightest but shady go new!

Second, someone is going to tell you to head over to Motorrad Elektric and buy Rick's book titled "Classic Boxer Charging"... unfortunately Rick doesn't have any left and isn't planning on printing a new edition any time soon.

12v is way too low, and you do have something wrong other than the battery for absolute certain... there are a number of things to check and methods to check them... my own voyage of discover his here...

"OK charging system Guru's.. WTF is up with my GS"

I would say to start by checking the rotor.... that's my guess. Although when my former R100RS had a similar issue, it was the brushes.

My current R80G/S throws about 13.7 volts at 4K rpm's.... all on the stock charging system
"punk rocks what it's all about" - J. Strummer

Originally Posted by Stagehand
your bike is suitably dirty. Well done.
So I sold my GS and went shopping for a G/S!
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